Growing Macadamia in Kwale

Soil suitability analysis based on Kwale's nutrient profile

Kwale County is a challenging environment for Macadamia (soil-match score 3/100) and will need significant amendment before planting. At an average pH of 6.76 the soil sits above Macadamia's preferred 4.5–6.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is phosphorus and potassium — measured at N 0.93 g/kg, P 9.8 mg/kg, K 131 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly sandy loam soils suit Macadamia, which favours loam. At 200 m, the county sits below Macadamia's preferred altitude range (900–2100 m), which limits yield potential due to heat stress. Macadamia's full potential is about 1,800 kg/acre (~KES 198,000/acre at KES 110/kg), but at Kwale's 3/100 suitability a realistic target here is closer to 68 kg/acre (~KES 7,480/acre) unless the constraints above are addressed.